REMOVE

1. ships
2. plants
3. cityscapes (representations)
4. campuses
5. automobiles
6. artists (visual artists)

WHAT

1. Visual Works (hierarchy n … (1)
2. barns (1)
3. black-and-white film (1)
4. buildings (structures) (1)
5. clouds (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1961 (1)
2. after 1961 (1)